sank
sangk
verb
Past tense of 'sink': to go down below the surface of water or other liquid.
"The Titanic sank after hitting an iceberg."
verb
Past tense of 'sink': to decrease or decline in value or quality.
"His spirits sank when he heard the news."
Thesaurus
Synonyms: slump, sink, fall off, drop down, drop, sump, cesspool, cesspit, dip, subside, pass, lapse